EP 1125923 B1 20050525 - Process for the preparation of N-methyl-2-pyrrolidinone (NMP)
Title (en)
Process for the preparation of N-methyl-2-pyrrolidinone (NMP)
Title (de)
Verfahren zur Herstellung von N-Methyl-2-Pyrrolidon (NMP)
Title (fr)
Procédé pour la préparation de N-méthyl-2-pyrrolidinone (NMP)
Publication
Application
Priority
DE 10004909 A 20000204
Abstract (en)
[origin: US2001018528A1] N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (gamma-BL), in a molar ratio of monomethylamine to gamma-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.
IPC 1-7
IPC 8 full level
C07B 61/00 (2006.01); C07D 207/267 (2006.01); C07D 207/26 (2006.01)
CPC (source: EP US)
C07D 207/267 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1125923 A2 20010822; EP 1125923 A3 20020807; EP 1125923 B1 20050525; AT E296285 T1 20050615; DE 10004909 A1 20010809; DE 50106282 D1 20050630; JP 2001278858 A 20011010; MY 124507 A 20060630; US 2001018528 A1 20010830; US 6348601 B2 20020219
DOCDB simple family (application)
EP 01101420 A 20010123; AT 01101420 T 20010123; DE 10004909 A 20000204; DE 50106282 T 20010123; JP 2001028837 A 20010205; MY PI20010470 A 20010202; US 77462801 A 20010201